671568 has 40 divisors (see below), whose sum is σ = 1839168. Its totient is φ = 210432.

The previous prime is 671557. The next prime is 671581. The reversal of 671568 is 865176.

671568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405 + ... + 1227.

2⁶⁷¹⁵⁶⁸ is an apocalyptic number.

671568 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919584).

671568 is an abundant number, since it is smaller than the sum of its proper divisors (1167600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671568 is a wasteful number, since it uses less digits than its factorization.

671568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 845 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 671568 is about 819.4925258964. The cubic root of 671568 is about 87.5716094066.

The spelling of 671568 in words is "six hundred seventy-one thousand, five hundred sixty-eight".